No new missons/ stuck in 49%

burguete

Hi. I dont know why, but at the sudden, new missions stop apperaring. Im at 49% of the game, and im doing some missions for Bernie.

The thing is that i was doing a mission for a Mafia boss...you had to take him to a warehouse, and with sniper, protect it him. I failed onde, reloaded the game, and the mission was there. I failed again, reloaded again, but this time i think i didnt receive the call that said wheree did i had to go...what can be happening?